CN205450266U - Human security installations of many people based on linear FM - Google Patents
Human security installations of many people based on linear FM Download PDFInfo
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- CN205450266U CN205450266U CN201521102971.3U CN201521102971U CN205450266U CN 205450266 U CN205450266 U CN 205450266U CN 201521102971 U CN201521102971 U CN 201521102971U CN 205450266 U CN205450266 U CN 205450266U
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Abstract
The utility model discloses a human security installations of many people based on linear FM, including scanning device, millimeter wave signal receiving and dispatching subassembly and image processing unit, scanning device includes a plurality of detection seats, locates each detect a plurality of guide rails and motor on the seat, be equipped with a set ofly on each guide rail millimeter wave signal receiving and dispatching subassembly, each millimeter wave signal receiving and dispatching subassembly by motor drive and for treating that the securair staff moves, millimeter wave signal receiving and dispatching subassembly is used for to treating that the securair staff launches the millimeter wave signal to the millimeter wave signal of receipt from treating the securair staff and reflecting, image processing unit is used for the basis the human body that the securair staff was treated to the millimeter wave signal of reflection carries out holographic three -dimensional imaging, obtains human three -dimensional image. The utility model discloses the low price, simple structure, easily integrated, resolution ratio is high, and the detection number is many in the unit interval, to the radiationless harm of human body.
Description
Technical field
This utility model relates to a kind of human body security check system, particularly relates to a kind of based on chirped many people human body rays safety detection apparatus.
Background technology
Millimeter wave is wavelength electromagnetic wave from 1mm to 10mm, and its frequency is 30GHz to 300GHz, in practical engineering application, often the low end frequency of millimeter wave is dropped to 26GHz.In electromagnetic spectrum, millimeter wave is positioned at the wave-length coverage that microwave overlaps mutually with far infrared wave, thus has the feature of two kinds of wave spectrums concurrently.Compared with microwave, the characteristic that narrow beam and high-gain aerial easily realize makes millimeter-wave systems can obtain higher spatial resolution and higher capacity of resisting disturbance, and meanwhile, millimeter-wave systems can suppress the multipath effect caused in microwave system because the detection elevation angle is too low；On the other hand, millimeter wave penetrates that the ability of plasma is strong, Doppler frequency shift big, it is highly sensitive to test the speed, and the volume of millimetric wave device is little, light weight, and therefore millimeter-wave systems is more easy of integration.Compared with infrared, laser, the decay that millimeter wave transmits in an atmosphere is the least, and it is had little to no effect by natural light and heat radiation source；Under the conditions of rugged environment and meteorology, such as cloud and mist, flue dust etc., infrared, laser all cannot normally work, but millimeter wave energy works round-the-clockly.The character of these uniquenesses imparts millimeter-wave technology and is widely applied prospect just, especially in field of safety check.
Along with the deterioration of national security Yu anti-terrorism situation, the inspection to public arena personal security just becomes more important.For a long time, public arena human body safety check is widely used metal detector gate to detect the metal that human body carries, but it cannot tackle non-metal kind article and the threats of weapon such as explosive, non-metallic tool, dangerous liquid material；" naked inspection instrument " human body safety check imaging device penetrates the character of the many kinds of substance such as medicated clothing, human body skin based on X-ray energy, also can effectively detect the dangerous goods that human body carries, but the health problem that X-ray is brought is disputed on for a long time.According to relevant research report, the ionizing radiation ability of X-ray can make the growth of biological cell be suppressed, destroy even necrosis.There are some researches show, in annual hundreds of millions of passengers accepting scanning, occur in that the cancer case thus caused on a small quantity.For these reasons, a lot of national requirements use " naked inspection instrument " the most in public.Therefore, the millimeter wave body scans imaging rays safety detection apparatus possessing the advantages such as quick, safe and reliable, secret protection is widely used in a variety of applications, and plays irreplaceable important function in terms of personnel's safety check.
Mm-wave imaging mechanism is divided into passive millimeter imaging and active millimeter wave imaging.The advantage of passive millimeter wave imaging system is simple in construction, realizes low cost, and shortcoming is exactly that imaging time is oversize, imaging resolution is poor.Along with development and the raising of millimetric wave device level of millimetric wave device technology, active millimeter wave imaging starts more and more to be paid attention to.Active millimeter wave imaging divides again synthetic aperture imaging and two kinds of mechanism of holographic imaging.The method of millimeter wave holographic imaging comes from optical holographic principle, i.e. utilize the relevant principle of electromagnetic wave, the millimeter-wave signal of high stable is transmitted in target to be measured by first transmitter, receiver receives the echo-signal of target and carries out Coherent processing with highly coherent reference signal, extract amplitude and the phase information of echo-signal, thus obtain the scattering properties on impact point, the target millimeter-wave image in scene is can be obtained by the most again by the method for data and image procossing.Millimeter-wave image resolution that active millimeter wave holographic imaging obtains is high, then matches with mechanical scanning and be substantially shorter imaging time, it is achieved through engineering approaches, so millimeter wave holographic imaging is particularly suitable for millimeter wave short range Active Imaging.
In sum, the shortcoming of existing safety check imaging device mainly has: non-metal kind article and the weapons such as based on X-ray " naked inspection instrument " easily missing inspection explosive, non-metallic tool, dangerous liquid material, and big to human injury；Passive millimeter wave imaging system images speed is slow, differentiates rate variance.
Utility model content
The purpose of this utility model is high for solving current X-ray safety check imaging device false dismissal probability, has collateral damage to human body, and passive millimeter wave imaging system images speed is slow, differentiates the technical problem of rate variance.
In order to solve above-mentioned technical problem, this utility model provides a kind of based on chirped many people human body rays safety detection apparatus, including including scanning means, millimeter-wave signal transmitting-receiving subassembly and graphics processing unit；
Described scanning means includes some detection seats, the some guide rails being located on each described detection seat and motor；Each described guide rail is provided with millimeter-wave signal transmitting-receiving subassembly described in a group, and each described millimeter-wave signal transmitting-receiving subassembly is driven by described motor and relative to treating that security staff moves；
The outfan of described millimeter-wave signal transmitting-receiving subassembly connects described graphics processing unit.
Further, also including alarm unit, the outfan of described graphics processing unit connects described alarm unit.
Further, each described millimeter-wave signal transmitting-receiving subassembly includes some millimeter-wave signal transmitter units and receives unit with its most some millimeter-wave signals；Each described millimeter-wave signal transmitter unit includes millimeter-wave signal transmitter module and connected transmitting antenna, and each described millimeter-wave signal receives unit and includes millimeter-wave signal receiver module and connected reception antenna；Each described transmission antenna group becomes transmitting antenna array, each described reception antenna composition receiving antenna array；
Each described millimeter-wave signal transmitting-receiving subassembly is around the body contour treating security staff on described detection seat, uniform motion on described guide rail.
Further, each described millimeter-wave signal transmitting-receiving subassembly includes 64 described millimeter-wave signal transmitter units, and the most corresponding described millimeter-wave signal of each described millimeter-wave signal transmitter unit receives unit.
Further, described millimeter-wave signal transmitter module includes the first independent signal source, the first directional coupler, the first power amplifier and the first varactor doubler；
The signal of described first independent signal source output delivers to the input of described first directional coupler, the straight-through outfan of the first directional coupler connects the input of described first power amplifier, the outfan of described first power amplifier connects the input of described first varactor doubler, and the outfan of described first varactor doubler connects described transmitting antenna.
Further, described millimeter-wave signal receiver module includes the second independent signal source, the second directional coupler, the first frequency mixer, the second power amplifier, the second varactor doubler, the second frequency mixer, the 3rd power amplifier, the 3rd varactor doubler, three-mixer and low-noise amplifier；
The signal of described second independent signal source output delivers to the input of described second directional coupler, the straight-through outfan of the second directional coupler connects the IF input terminal of described first frequency mixer, the coupled end of described first directional coupler connects the rf inputs of described first frequency mixer, the local oscillator outfan of the first frequency mixer connects the input of described second power amplifier, the outfan of described second power amplifier connects the input of described second varactor doubler, the outfan of described second varactor doubler connects the local oscillator input of described second frequency mixer, the rf inputs of the second frequency mixer connects described reception antenna, the medium frequency output end of the second frequency mixer connects the rf inputs of described three-mixer；
The coupled end of described second directional coupler connects the input of described 3rd power amplifier, the outfan of described 3rd power amplifier connects the input of described 3rd varactor doubler, the outfan of described 3rd varactor doubler connects the local oscillator input of described three-mixer, the medium frequency output end of three-mixer connects the input of described low-noise amplifier, and the outfan of low-noise amplifier connects described graphics processing unit.
Further, described first independent signal source is the operating frequency frequency modulation signal source at 18.5GHz-21.5GHz.
Further, also including microcontroller, the power output end of the electric supply installation in described second independent signal source and the first independent signal source connects single pole multiple throw, and described microcontroller is for controlling the break-make of described single pole multiple throw.
Further, described second independent signal source is the operating frequency point frequency VCO source at 50MHz.
Further, described graphics processing unit includes data acquisition and processing module and image-display units.
Further, in each described detection seat, it is equipped with described guide rail on the face of human contact.
This utility model the most existing mm-wave imaging safety check instrument has an advantage highlighted below:
(1) cheap: this utility model utilizes the scanning effect driving motor to make one-dimensional array antenna reach face array, significantly reduces cost.
(2) simple in construction, it is easy to integrated；This utility model uses single pole multiple throw to control the order of channels operation, uses frequency modulation signal source and millimetric wave device to carry out building of system, greatly reduces the complexity of system, also improve the integrated level of system simultaneously.
(3) resolution is high: uses Continuous Wave with frequency modulation technology, super-heterodyne technique and holographic imaging technology in this utility model, improves the resolution of 3-D view plane and the degree of depth.
(4) in the unit interval, detection number is many: this utility model uses active millimeter wave imaging, and imaging time is fast, and this utility model can disposably accommodate 4 people and detect simultaneously, substantially increases detection number in the unit interval.
(5) harm radiationless to human body: this utility model utilizes mm-wave imaging, and millimeter wave can send harmful ionizing radiation unlike X-ray, is healthy, safe for detected personnel.
Accompanying drawing explanation
Fig. 1 is the theory diagram of one embodiment of equipment described in the utility model；
Fig. 2 is the theory diagram of another embodiment of equipment described in the utility model；
Fig. 3 is the scanning means schematic diagram of the single detection seat of equipment described in the utility model；
Fig. 4 is the schematic layout pattern that multiple detection seat carries out many people safety check；
Fig. 5 is superhet millimeter-wave signal Transmit-Receive Unit schematic diagram；
Fig. 6 is the imaging algorithm flow chart that this utility model uses；
Fig. 7 is imaging schematic diagram of the present utility model.
In figure: scanning means 11；Millimeter-wave signal transmitting-receiving subassembly 12；Millimeter-wave signal transmitter unit 1201；Millimeter-wave signal receives unit 1202；Transmitting antenna array 1203；Receiving antenna array 1204；Graphics processing unit 13；Data acquisition and processing module 1301；Image-display units 1302；Alarm unit 14；
Detection seat 20；Face, guide rail place 201,202,203,204；Guide rail 205,206,207,208；Motor 209；Treat security staff 210；
Detection seat 301,302,303,304,305；
First independent signal source 401；First independent signal source 402；First directional coupler 404；Second directional coupler 405；First frequency mixer 406；First power amplifier 407；Second power amplifier 408；3rd power amplifier 409；First varactor doubler 410；Second varactor doubler 411；3rd varactor doubler 412；Second frequency mixer 413；Three-mixer 414；Low-noise amplifier 415；Launch antenna 416；Reception antenna 417,601；Treat security staff 602.
Detailed description of the invention
Presently in connection with accompanying drawing, this utility model is described in further detail.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present utility model is described the most in a schematic way, and therefore it only shows the composition relevant with this utility model.
Embodiment as shown in Figure 1, of the present utility model based on chirped many people human body rays safety detection apparatus, including scanning means 11, millimeter-wave signal transmitting-receiving subassembly 12 and graphics processing unit 13.Wherein scanning means 11 includes multiple detection seat, five detection seats 301,302,303,304,305 as shown in Figure 4.As shown in Figure 3, the side 201 of each detection seat 20 and respectively with treat to be provided with guide rail 205,206,207,208 on the face 202,203,204 that the back of security staff 210, buttocks, leg contact, one group of millimeter-wave signal transmitting-receiving subassembly 12 is installed on every guide rail, drive motor 209 to be used for driving millimeter-wave signal transmitting-receiving subassembly 12 along guide rail linear uniform motion, make millimeter-wave signal transmitting-receiving subassembly 12 can scan human body comprehensively.Millimeter-wave signal transmitting-receiving subassembly 12 include some millimeter-wave signal transmitter units and with its one to one millimeter-wave signal receive unit, it is preferable that include that 64 millimeter-wave signals of 64 millimeter-wave signal transmitter units and correspondence receive unit.As it is shown in figure 1, each millimeter-wave signal transmitter unit includes millimeter-wave signal transmitter module 1201 and connected transmitting antenna, all transmitting antennas of a millimeter-wave signal transmitting-receiving subassembly 12 constitute transmitting antenna array 1203；Each millimeter-wave signal receives unit and includes millimeter-wave signal receiver module 1202 and connected reception antenna, and all reception antennas of a millimeter-wave signal transmitting-receiving subassembly 12 constitute receiving antenna array 1204；Graphics processing unit 13 includes data acquisition and processing module 1301 and image-display units 1302.
As shown in Figure 5, schematic diagram for a Transmit-Receive Unit in millimeter-wave signal transmitting-receiving subassembly 12, Transmit-Receive Unit uses superhet millimeter-wave signal Transmit-Receive Unit herein, and wherein millimeter-wave signal transmitter unit includes first independent signal source the 401, first directional coupler the 404, first power amplifier the 407, first varactor doubler 410 and launches antenna 416.First independent signal source 401 can be the operating frequency frequency modulation signal source at 18.5GHz-21.5GHz, the signal of its output delivers to the input of the first directional coupler 404, the straight-through outfan of the first directional coupler 404 connects the input of the first power amplifier 407, the outfan of the first power amplifier 407 connects the input of the first varactor doubler 410, and the outfan of the first varactor doubler 410 connects launches antenna 416.
Millimeter-wave signal receives unit and includes second independent signal source the 402, second directional coupler the 405, first frequency mixer the 406, second power amplifier the 408, second varactor doubler the 411, second frequency mixer the 413, the 3rd power amplifier the 409, the 3rd varactor doubler 412, three-mixer 414, low-noise amplifier 415 and reception antenna 417；nullSecond independent signal source 402 can be the operating frequency point frequency VCO source at 50MHz，The signal of its output delivers to the input of the second directional coupler 405，The straight-through outfan of the second directional coupler 405 connects the IF input terminal of the first frequency mixer 406，The coupled end of the first directional coupler 404 connects the rf inputs of the first frequency mixer 406，The local oscillator outfan of the first frequency mixer 406 connects the input of the second power amplifier 408，The outfan of the second power amplifier 408 connects the input of the second varactor doubler 411，The outfan of the second varactor doubler 411 connects the local oscillator input of the second frequency mixer 413，The rf inputs of the second frequency mixer 413 connects reception antenna 417，The medium frequency output end of the second frequency mixer 413 connects the rf inputs of three-mixer 414；The coupled end of the second directional coupler 405 connects the input of the 3rd power amplifier 409, the outfan of the 3rd power amplifier 408 connects the input of the 3rd varactor doubler 412, the outfan of the 3rd varactor doubler 412 connects the local oscillator input of three-mixer 414, the medium frequency output end of three-mixer 414 connects the input of low-noise amplifier 415, and the outfan of low-noise amplifier 415 connects graphics processing unit 14.
Embodiment as shown in Figure 2, difference with Fig. 1 embodiment is, add alarm unit 14, alarm unit 14 is connected with data acquisition and processing module 1301, when the 3-D view processing the human body obtained through data acquisition and processing module 1301 does not mates after the safe human body three-dimensional image comparison prestored, then alarm unit 14 sends alarm.
Data acquisition and processing module 1301 in graphics processing unit 13 are used for gathering the echo-signal from low-noise amplifier 415, and the 3-D view of security staff's human body 210 is obtained treating by Fourier transformation and inverse transformation, image-display units 1302 is for showing the 3-D view of human body.As shown in Figure 6, the imaging algorithm flow chart used for this utility model, first, first data acquisition and the processing module 1301 signal to collecting carry out the collection (step 501) of echo information, by it together with the signal contact of locus；Then, it carries out the Fourier transformation (step 502) of geometrical property to utilize Fourier transform pairs；Then, inverse Fourier transform (step 503) is carried out after abbreviation deformation；Finally, obtain target three-dimensional image (step 504), carry out the acquisition of final data in conjunction with spatial domain positional information, restore target three-dimensional image.
Preferably, of the present utility model based on chirped many people human body rays safety detection apparatus, also include microcontroller (not shown), also the power output end in the second independent signal source 402 and the electric supply installation (not shown) in the first independent signal source 401 connects single pole multiple throw (not shown), and microcontroller is for controlling the break-make of single pole multiple throw.So, each millimeter-wave signal Transmit-Receive Unit in the millimeter-wave signal transmitting-receiving subassembly on each guide rail all can work alone under the control of single pole multiple throw rather than all millimeter-wave signal Transmit-Receive Units work simultaneously, is substantially reduced system power dissipation.
As a example by each millimeter-wave signal transmitting-receiving subassembly 12 of equipment described in the utility model has 64 transceiver channels, when using this equipment to carry out personnel's safety check, multiple security staff for the treatment of 210 can be sitting on multiple detection seat 20 simultaneously and carry out safety check simultaneously, typically will be through following steps:
Step 1: motor 209 simultaneously drives each group millimeter-wave signal transmitting-receiving subassembly 12 linear uniform motion on guide rail 205,206,207 and 208, detection it is scanned before and after treating security staff 210,64 transmitting antennas 416 in each millimeter-wave signal transmitting-receiving subassembly 12 constitute transmitting antenna array 1203, transmitting antenna array 1203 launches millimeter wave to the human body treating security staff 210, and human body carries out omnibearing millimeter wave scanning；
Step 2: simultaneously, the receiving antenna array 1204 being made up of 64 reception antennas 417 in each millimeter-wave signal transmitting-receiving subassembly 12 receives the echo-signal with target information reflected by human body, and echo-signal millimeter-wave signal receiver module 1202 in described millimeter-wave signal transmitting-receiving subassembly 12 delivers to the data acquisition in graphics processing unit 13 and processing module 1301；Preferably, control the second independent signal source 402 by microcontroller (not shown) and connect 64 transceiver channels the most one by one with the single pole multiple throw (not shown) of the electric supply installation (not shown) power output end in the first independent signal source 401, the most first connect the first millimeter-wave signal transmitter unit and the first corresponding millimeter-wave signal receives the first transceiver channel that unit forms, after the first transceiver channel transmitting-receiving task completes, close the first transceiver channel, it is then turn on the second millimeter-wave signal transmitter unit and the second corresponding millimeter-wave signal receives the second transceiver channel that unit forms, by that analogy, until the 64th transceiver channel, so circulate work；
Step 3: after data acquisition in graphics processing unit 13 and processing module 1301 gather data, restored the human body image information in described echo-signal by Fourier transform and inverse transformation；
Step 4: by the 3-D view of above-mentioned human body image information with the safe human body of the standard prestored is compared, see and whether mate；If coupling, when i.e. human body image information not existing suspicious region, then pass through safety check；If not mating, when i.e. there is suspicious region in human body image information, the alarm in alarm unit sends audible alarm；Treat security staff 10 and carry out manual detection, get rid of potential safety hazard.
Then next group people is carried out safety check, so move in circles.
Such as, the first independent signal source 401 is the operating frequency frequency modulation signal source at 18.5GHz-21.5GHz, is represented by:
Wherein A1It is expressed as initial magnitude,For the initial phase value of signal source (401), B is FM signal bandwidth, and T is the frequency modulation cycle.Its output signal inputs the first directional coupler 404 input；Second independent signal source 402 is the operating frequency continuous wave signal source at 50MHz, is expressed as:
Second independent signal source 402 is the unifrequency continuous wave signal source of a fixed frequency, and its initial magnitude and phase place are respectively A2WithFrequency is f2.Its output signal inputs the second directional coupler 405 input.First directional coupler 404 is three port devices, its straight-through end connects the first power amplifier 407, this link power is made to reach the safe input power range of the first varactor doubler 410, after the first varactor doubler 410, this link incoming frequency frequency multiplication is to 37GHz-43GHz, is finally radiated in space by a transmitting antenna 416.Transmitting signal now can be expressed as:
First frequency mixer 406 is three port devices, three ports are respectively RF, LO, IF, wherein IF terminates the straight-through end of the second directional coupler 405, the intermediate-freuqncy signal of input 50MHz, radio frequency terminates the coupled end of the first directional coupler 404, the FM signal of input 18.5GHz-21.5GHz, local oscillator LO end then exports the difference frequency signal of RF and IF and inputs to the second power amplifier 408 so that it is signal power is amplified in the range of safety operation of the second varactor doubler 411.Now, the signal of the second varactor doubler 411 output is the signal of two frequencys multiplication again after two signal sources are mixed, and is expressed as:
Second frequency mixer 413 is three port devices, three ports are respectively RF, LO, IF, wherein local oscillator LO terminates output signal S (t) of the second varactor doubler 411, the echo-signal of the target reflection that radio frequency end input reception antenna 417 receives, echo-signal now can be expressed as:
Wherein α is echo-signal attenuation quotient, and τ=2R/c is the echo time delay that detecting object produces, and c is the electromagnetic wave spread speed in space.
Second frequency mixer 413 medium-frequency IF end then exports the superheterodyne signal of local oscillator LO and radio frequency, and this signal, with certain extraterrestrial target information, can be expressed as:
Be can be seen that the incoherence of two signal sources by (6) formula, in order to obtain coherent signal, introduce three-mixer 414.Three-mixer 414 exports the superheterodyne signal with target coherence messages, and its radio frequency end inputs the signal S of down coversion firstIF(t), local oscillator LO end inputs by the second independent signal source 402 through the second directional coupler 405 coupled end, the 3rd power amplifier 409 and the 100MHz continuous wave signal of the 3rd varactor doubler 412, it may be assumed that
Three-mixer 414 medium-frequency IF end then exports the second time down-conversion signal S ' with target informationIF(t), that is:
Can be seen that from formula (8) and use the phase place this method eliminateing the introducing of incoherent dual signal source asynchronous.Low-noise amplifier 415 can make the intermediate-freuqncy signal through twice down coversion is faint be amplified, and improves the signal to noise ratio of output signal, detectivity, and its output signal sends into data acquisition and processing module 1301.
As it is shown in fig. 7, millimeter wave through treating security staff 602 (x, y, z) after the scattering at location point, position is (X, Y, Z0) reception antenna 601 start the wideband echoes signal after receiving scattering, signal that reception antenna 601 receives sends into millimetre-wave circuit and highly coherent local oscillation signal carries out down coversion, then by low-noise amplifier 415.Assuming that the signal obtained is E (X, Y, ω), wherein ω is the instantaneous angular frequency of emission source, and E (X, Y, ω) is the function about ω, and its expression formula is:
Wherein,It is the distance between antenna and impact point,For electromagnetic beam, exponential part represents the spherical wave signal of target scattering, plays an important role target three-dimensional scattering imaging.And:
E (X, Y, ω) is time-domain signal, it be to time dimension signal E (X, Y, t) carry out the expression formula after Fourier transformation, it may be assumed that
E (X, Y, ω)=FT [E (X, Y, t)] (11)
Formula (10) is substituted into formula (9), and the vector calculus of wushu (9) is simplified to scalar operation, understands, can regard as a Spherical wave expansion, be expressed as the superposition of plane wave, obtain from physical significance:
Formula employs three-dimensional Fourier transform in (12), it may be assumed that
Also it is an inverse Fourier transform, it may be assumed that
Have ignored constant term in formula (13), wushu (13) substitutes into formula (12) and can get:
Formula (15) is carried out inverse transformation, and can obtain final millimeter wave holographic imaging formula is:
From formula (16) if it can be seen that obtain the electromagnetic information of the echo-signal of each Frequency point, it is possible to (x, y z), finally obtain the three-dimensional millimeter wave hologram image of imageable target to obtain f by a series of invertings.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff can carry out various change and amendment completely in the range of without departing from this utility model technological thought.The content that the technical scope of this utility model is not limited in description, it is necessary to determine its technical scope according to right.
Claims (11)
1. based on chirped many people human body rays safety detection apparatus, it is characterised in that include scanning means, millimeter-wave signal transmitting-receiving subassembly and graphics processing unit；
Described scanning means includes some detection seats, the some guide rails being located on each described detection seat and motor；Each described guide rail is provided with millimeter-wave signal transmitting-receiving subassembly described in a group, and each described millimeter-wave signal transmitting-receiving subassembly is driven by described motor and relative to treating that security staff moves；
The outfan of described millimeter-wave signal transmitting-receiving subassembly connects described graphics processing unit.
The most according to claim 1 based on chirped many people human body rays safety detection apparatus, it is characterised in that also to include alarm unit, the outfan of described graphics processing unit connects described alarm unit.
The most according to claim 1 and 2 based on chirped many people human body rays safety detection apparatus, it is characterised in that each described millimeter-wave signal transmitting-receiving subassembly includes some millimeter-wave signal transmitter units and receives unit with its most some millimeter-wave signals；Each described millimeter-wave signal transmitter unit includes millimeter-wave signal transmitter module and connected transmitting antenna, and each described millimeter-wave signal receives unit and includes millimeter-wave signal receiver module and connected reception antenna；Each described transmission antenna group becomes transmitting antenna array, each described reception antenna composition receiving antenna array；
Each described millimeter-wave signal transmitting-receiving subassembly is around the body contour treating security staff on described detection seat, uniform motion on described guide rail.
The most according to claim 3 based on chirped many people human body rays safety detection apparatus, it is characterized in that, each described millimeter-wave signal transmitting-receiving subassembly includes 64 described millimeter-wave signal transmitter units, and the most corresponding described millimeter-wave signal of each described millimeter-wave signal transmitter unit receives unit.
The most according to claim 3 based on chirped many people human body rays safety detection apparatus, it is characterised in that described millimeter-wave signal transmitter module includes the first independent signal source, the first directional coupler, the first power amplifier and the first varactor doubler；
The signal of described first independent signal source output delivers to the input of described first directional coupler, the straight-through outfan of the first directional coupler connects the input of described first power amplifier, the outfan of described first power amplifier connects the input of described first varactor doubler, and the outfan of described first varactor doubler connects described transmitting antenna.
The most according to claim 5 based on chirped many people human body rays safety detection apparatus, it is characterized in that, described millimeter-wave signal receiver module includes the second independent signal source, the second directional coupler, the first frequency mixer, the second power amplifier, the second varactor doubler, the second frequency mixer, the 3rd power amplifier, the 3rd varactor doubler, three-mixer and low-noise amplifier；
The signal of described second independent signal source output delivers to the input of described second directional coupler, the straight-through outfan of the second directional coupler connects the IF input terminal of described first frequency mixer, the coupled end of described first directional coupler connects the rf inputs of described first frequency mixer, the local oscillator outfan of the first frequency mixer connects the input of described second power amplifier, the outfan of described second power amplifier connects the input of described second varactor doubler, the outfan of described second varactor doubler connects the local oscillator input of described second frequency mixer, the rf inputs of the second frequency mixer connects described reception antenna, the medium frequency output end of the second frequency mixer connects the rf inputs of described three-mixer；
The coupled end of described second directional coupler connects the input of described 3rd power amplifier, the outfan of described 3rd power amplifier connects the input of described 3rd varactor doubler, the outfan of described 3rd varactor doubler connects the local oscillator input of described three-mixer, the medium frequency output end of three-mixer connects the input of described low-noise amplifier, and the outfan of low-noise amplifier connects described graphics processing unit.
The most according to claim 5 based on chirped many people human body rays safety detection apparatus, it is characterised in that described first independent signal source is the operating frequency frequency modulation signal source at 18.5GHz-21.5GHz.
The most according to claim 6 based on chirped many people human body rays safety detection apparatus, it is characterized in that, also include microcontroller, the power output end of the electric supply installation in described second independent signal source and the first independent signal source connects single pole multiple throw, and described microcontroller is for controlling the break-make of described single pole multiple throw.
The most according to claim 6 based on chirped many people human body rays safety detection apparatus, it is characterised in that described second independent signal source is the operating frequency point frequency VCO source at 50MHz.
The most according to claim 6 based on chirped many people human body rays safety detection apparatus, it is characterised in that described graphics processing unit includes data acquisition and processing module and image-display units.
11. is according to claim 1 based on chirped many people human body rays safety detection apparatus, it is characterised in that in each described detection seat, is equipped with described guide rail on the face of human contact.
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| CN201521102971.3U CN205450266U (en) | 2015-12-25 | 2015-12-25 | Human security installations of many people based on linear FM |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017107283A1 (en) * | 2015-12-25 | 2017-06-29 | 深圳市太赫兹科技创新研究院 | Apparatus and method for security check of multiple human bodies based on linear frequency modulation |
| CN109541699A (en) * | 2018-10-25 | 2019-03-29 | 深圳市华讯方舟太赫兹科技有限公司 | Safety check instrument system, millimeter wave transceiving module and its millimeter-wave signal generate component |
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2015
- 2015-12-25 CN CN201521102971.3U patent/CN205450266U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017107283A1 (en) * | 2015-12-25 | 2017-06-29 | 深圳市太赫兹科技创新研究院 | Apparatus and method for security check of multiple human bodies based on linear frequency modulation |
| US11163058B2 (en) | 2015-12-25 | 2021-11-02 | Shenzhen Cct Thz Technology Co., Ltd. | Apparatus and method for security check of multiple human bodies based on linear frequency modulation |
| CN109541699A (en) * | 2018-10-25 | 2019-03-29 | 深圳市华讯方舟太赫兹科技有限公司 | Safety check instrument system, millimeter wave transceiving module and its millimeter-wave signal generate component |
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